WXME0104 ## wxtextwxtabwxmediawximage$(lib "comment-snip.ss" "framework")+(lib "collapsed-snipclass.ss" "framework")drscheme:sexp-snipdrscheme:number,(lib "number-snip.ss" "drscheme" "private")"drscheme:vertical-separator-snip%wxbaddrscheme:xml-snip(lib "xml-snipclass.ss" "xml")drscheme:scheme-snip"(lib "scheme-snipclass.ss" "xml")wxloc+K ZZZZ€ÿ€ÿ€ÿ StandardK-adobe-courier ZZZZ€ÿ€ÿ€ÿF?ð\ZZZ?ð?ð?ð"€‹"Matching Parenthesis StyleF?ð\ZZZ?ð?ð?ð"€‹"F?ð\ZZZ?ð?ð?ð(drscheme:check-syntax:keywordF?ð\ZZZ?ð?ð?ð(F?ðZZZZ?ð?ð?ð€ÿ'drscheme:check-syntax:unbound-variableF?ðZZZZ?ð?ð?ð€ÿF?ðZZZZ?ð?ð?ð€€%drscheme:check-syntax:bound-variableF?ðZZZZ?ð?ð?ð€€ drscheme:check-syntax:primitiveF?ðZZZZ?ð?ð?ð€€F?ðZZZZ?ð?ð?ð3€‡'drscheme:check-syntax:constantF?ðZZZZ?ð?ð?ð3€‡'F?ðZZZZ?ð?ð?ð€¥**drscheme:check-syntax:baseF?ðZZZZ?ð?ð?ð€¥**F?ðZZZZ?ð?ð?ð?ð?ð?ðXMLF?ðZZZZ?ð?ð?ð?ð?ð?ðG?ðZZZZ?ð?ð?ð?ð?ð?ðF?ðZZZZ?ð?ð?ð€ÿG?ðZZZZ?ð?ð?ð€ÿG?ðZZZZ?ð?ð?ðdF?ð\ZZZ?ð?ð?ð€¯K ZZZZ€ÿ€ÿ€ÿK-adobe-courier ZZZZ€ÿ€ÿ€ÿF?ð\ZZZ?ð?ð?ð"€‹"F?ð\ZZZ?ð?ð?ð(F?ðZZZZ?ð?ð?ð€ÿF?ðZZZZ?ð?ð?ð€€F?ðZZZZ?ð?ð?ð3€‡'F?ðZZZZ?ð?ð?ð€¥**F?ðZZZZ?ð?ð?ð?ð?ð?ðG?ðZZZZ?ð?ð?ð?ð?ð?ðF?ðZZZZ?ð?ð?ð€ÿG?ðZZZZ?ð?ð?ð€ÿG?ðZZZZ?ð?ð?ðdF?ð\ZZZ?ð?ð?ð€¯F?ðZZ^Z?ð?ð?ð€ÿF?ð\ZZZ?ð?ð?ð€–€–F?ðZZ^Z?ð?ð?ð€ÿF?ð\ZZZ?ð?ð?ð€–€–F?ðZZZZ?ð?ð?ð€ÈF?ðZZZZ?ð?ð?ð€È9(require (lib "url.ss" "net")) (require (lib "head.ss" "net"))  g(define url:snapshot (string->url "http://10.10.1.101/SnapshotJPEG?Resolution=320x240&Quality=Motion")) ;the url for the jpeg  (define (test url) 9 (call/input-url url get-impure-port display-pure-port))  ;(test url:snapshot) &;returned the ascii source of the jpeg ;ex. from beginning  ’ HTTP/1.0 200 OK   Expires: 0  Content-type: image/jpeg  ÿØÿÛCP#   -;(purify-port (get-impure-port url:snapshot)) ';returned a number version of the ascii ;example from beginning  ^I"HTTP/1.0 200 OK\r\nExpires: 0\r\nContent-type: image/jpeg\n\n\377\330\37  B;(extract-all-fields (purify-port (get-impure-port url:snapshot))) A;retruned an s-expression containing the field names and contents ;example from beginning }(("Expires" . "0")  ("Content-type"  .  "image/jpeg\n\n\377\330\37   L;(extract-field "content-type" (purify-port (get-impure-port url:snapshot))) :;returns just the content of the image without the headers ;example from beginning /"image/jpeg\n\n\377\330\37  €…;(with-output-to-file "testpic.jpg" (lambda ()(display (extract-field "Content-type" (purify-port (get-impure-port url:snapshot)))))) ;writes the ascii to a file ;the file can not be viewed